Thousands of you are all shocked at this feet of deepthroating, but I assure you this is not as fantastical as you think.
In fact, this is a modern take on the 5,000 year old practice of sword swallowing. Which is actually not swallowing at all, rather repressing the swallowing reflex to keep the passage from the mouth to the esophagus to the stomach clear. The key to this trick is to eliminate the gag reflex. Many claim that they have none, but in actuality it takes years to completely conquer this instinct to gag. You start small with spoons, knitting needles, plastic tubes, and eventually wire coat hangers. Slowly getting your throat accustomed to touch.
The next technique you must learn is to lean the head back, hyper-extending the neck, and relax the upper esophageal sphincter. This particular sphincter is an involuntary muscle and also takes much practice to master controlling it. The object is lubricated by saliva making the rest of its journey down your neck a little easier. It passes the pharynx and the sphincter and then the flexible esophagus straightens in line with the object. If the object needs to enter the stomach, the performer must align the stomach before it enters the cardiac opening. It is recommended to eat a large meal beforehand to more easily accomplish this. I recommend stuffed crust pizza or perhaps a large sandwich with plentiful toppings.
Compared to professional sword swallowers, this lady is actually unimpressive. I don’t think that thing goes much past her throat and it isn’t near her stomach. I doubt she has much of a future in the circus.